Computer [Computer Networks (15) + DBMS (20) + Software Project Management (20) + Software Engineering (20) + Computer Fundamentals (20) + OOP Using C++ (20)] — 15 Aug 2026 — Free Online Test

Computer Networks

Q1 / 115

Differential Manchester and multi line transmission (MLT-3) schemes differ in

A Number of transition rules to encode binary data B Self synchronization C Both a and b D None of the above

Computer Networks

Q2 / 115

If the sender is a host and wants to send a packet to another host on another network, the logical address that must be mapped to a physical address is ______.

A the destination IP address in the datagram header B the IP address of the router found in the routing table C either a or b D none of the above

Computer Networks

Q3 / 115

In _______ forwarding, the routing table holds the address of just the next hop instead of complete route information.

A next-hop B network-specific C host-specific D default

Computer Networks

Q4 / 115

A program which runs in the background and sends results requested by a client is called a .

A server B client C port D ip address

Computer Networks

Q5 / 115

IPS in firewall stands for .

A intrusion protection system B intrusion prevention software C internet prevention system D intrusion prevention system

Computer Networks

Q6 / 115

A cable break in which topology stops all transmission

A Mesh B Bus C Star D Primary

Computer Networks

Q7 / 115

In Address Resolution Protocol (ARP), a packet is encapsulated directly into a

A Data link Integer B data link IP C Data link Station D Data link Frame

Computer Networks

Q8 / 115

_______ is a process-to-process protocol that adds only port addresses, checksum error control, and length information to the data from the upper layer.

A TCP B UDP C IP D none of the above

Computer Networks

Q9 / 115

TCP/IP port number 69 is assigned for .

A telnet B simple mail transfer protocol (smtp) C file transfer protocol protocol (ftp) D trivial file transfer protocol (tftp)

Computer Networks

Q10 / 115

Normally, WiFi signal reach m distance.

A 50 to 100m B 1 to 2m C 0.5 to 1.0m D 2 to 3m

Computer Networks

Q11 / 115

The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called

A piggybacking B cyclic redundancy check C fletcher’s checksum D none of the mentioned

Computer Networks

Q12 / 115

Usually, telnet connection is established using command followed by name of host.

A ftp B telnet C ping D ls

Computer Networks

Q13 / 115

An endpoint of an inter-process communication flow across a computer network is called

A socket B pipe C port D none of the above

Computer Networks

Q14 / 115

Which of the following functions does UDP perform?

A process-to-process communication B host-to-host communication C end-to-end reliable data delivery D none of the above

Computer Networks

Q15 / 115

In a _________ protocol, the data section of a frame is a sequence of bits.

A byte-oriented B bit-oriented C either (a) or (b) D none of the above

DBMS

Q16 / 115

DB::table('questions')->insertGetId(['question'=>'Q?',...]) returns

A NULL B Array of IDs C Boolean true D The auto-increment ID of the newly inserted row

DBMS

Q17 / 115

READ COMMITTED isolation

A Allows dirty reads B Prevents dirty reads but allows non-repeatable and phantom reads C Prevents all anomalies D Prevents phantom reads only

DBMS

Q18 / 115

What is a hash index and in what scenarios is it superior to a B-tree index?

A A distributed index across multiple hash partitions B An index using a hash function to map key values to bucket positions - supports only equality lookups (O(1) average) but NOT range queries or ordering; superior for equality-only workloads with no range/ordering requirements C An index using a sorted hash table D A B-tree index using hash-based key comparison

DBMS

Q19 / 115

What is a GiST (Generalized Search Tree) index in PostgreSQL and what data types does it support?

A An index for geographic spatial data only B An extensible index framework that supports a wide variety of data types and query operators beyond equality/comparison: geometric objects text search IP ranges JSON paths custom types - by allowing user-defined key types and split/union/penalty functions C A special type of B-tree for integers only D A global index that spans multiple tables simultaneously

DBMS

Q20 / 115

OPTIMIZE TABLE questions in MySQL

A Drops the table B Deletes all rows C Checks for errors D Defragments the table and updates statistics for better performance

DBMS

Q21 / 115

The minimal set of super key is called

A primary key B secondary key C foreign key D candidate key

DBMS

Q22 / 115

____ is a translates into low-level instruction that a query processor understands:

A DBA B DBMS C DBS D DDL compiler

DBMS

Q23 / 115

Which of the following is used for manufacturing chips?

A control bus B control unit C parity unit D semiconductor

DBMS

Q24 / 115

Which rules are defined in relational models they from as an essential part of any relation database:

A Integrity rules B Database C Record D Memory

DBMS

Q25 / 115

Which of the following is based on Multi Valued Dependency?

A third B fourth C first D second

DBMS

Q26 / 115

Which of the following commands do we use to delete a relation (R) from a database?

A drop table R B drop relation R C delete table R D delete from R

DBMS

Q27 / 115

To remove all tag associations from a question in Eloquent M:N

A $question->tags()->delete() B $question->delete() C $question->tags()->remove() D $question->tags()->detach()

DBMS

Q28 / 115

What are the diﬀerent events in Triggers?

A deﬁne, create B drop, comment C insert, update, delete D select, commit

DBMS

Q29 / 115

Which of the following is used to get back all the transactions back after rollback?

A commit B rollback C flashback D redo

DBMS

Q30 / 115

……………… defines rules regarding the values allowed in columns and is the standard mechanism for enforcing database integrity.

A Column B Constraint C Index D Trigger

DBMS

Q31 / 115

Which of the following is not true of the traditional approach to information processing

A There is common sharing of data among the various applications B It is file oriented C Programs are dependent on the file D It is inflexible

DBMS

Q32 / 115

The process of Normalization is

A Iterative B Non-reversible C Reversible D None

DBMS

Q33 / 115

Timestamp-based CC assigns each transaction

A A lock B Unique timestamp at start time for ordering operations C A sequential ID D A priority level

DBMS

Q34 / 115

Which one is true about clustered index?

A clustered index is not associated with table B clustered index is built by default on unique key columns C clustered index is not built on unique key columns D none of the mentioned

DBMS

Q35 / 115

There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identiﬁer, name, and salary attributes. This process is called

A commonality B specialization C generalization D similarity

Software Project Management

Q36 / 115

Which of the following risks are derived from the organizational environment where the software is being developed?

A people risks B technology risks C estimation risks D organizational risks

Software Project Management

Q37 / 115

are used to represent activity in a network diagram.

A circles B squares C rectangles D arrows

Software Project Management

Q38 / 115

The strategy of making processes that are logically runnable to be temporarily suspended is called

A non preemptive scheduling B preemptive scheduling C shortest job first D first come first served

Software Project Management

Q39 / 115

What is one or more software configuration items that have been formally reviewed and agreed upon and serve as a basis for further development?

A baseline B cumulative changes C cm D change control

Software Project Management

Q40 / 115

Which of the following process ensures that versions of systems and components are recorded and maintained?

A codeline B configuration control C version D workspace

Software Project Management

Q41 / 115

The environment that supports the software project is called

A clss B see C fast D cbse

Software Project Management

Q42 / 115

Which one of the following is not an Evolutionary Process Model?

A winwin spiral model B incremental model C concurrent development model D all of the mentioned

Software Project Management

Q43 / 115

Which of the following algorithms tends to minimize the process flow time?

A first come first served B shortest job first C earliest deadline first D longest job first

Software Project Management

Q44 / 115

What is often undefined and is left to the ingenuity of the project managers and engineers?

A role B exception C activity D process

Software Project Management

Q45 / 115

Commitments to unrealistic time and resource estimates may result in

A project delay B poor quality work C project failure D all of the mentioned

Software Project Management

Q46 / 115

Which of the following is not a change management process?

A log the changes B estimate impact on effort and schedule C review impact with stakeholders D none of the mentioned

Software Project Management

Q47 / 115

Which layer is used to link the network support layers and user support layers?

A session layer B data link layer C transport layer D network layer

Software Project Management

Q48 / 115

is the first enemy of communication.

A noise B clarity C politeness D completeness

Software Project Management

Q49 / 115

Which of these describes stepwise refinement?

A nicklaus wirth described the first software engineering method as stepwise refinement B stepwise refinement follows its existence from 1971 C it is a top down approach D all of the mentioned

Software Project Management

Q50 / 115

Function Points in software engineering was first proposed by

A booch B boehm C albrecht D jacobson

Software Project Management

Q51 / 115

What is FIFO algorithm?

A first executes the job that came in last in the queue B first executes the job that came in first in the queue C first executes the job that needs minimal processor D first executes the job that has maximum processor needs

Software Project Management

Q52 / 115

Which of the following is/are White box technique?

A statement testing B decision testing C condition coverage D all of the mentioned

Software Project Management

Q53 / 115

Which of the following is not a project manager’s activity?

A project control B project management C project planning D project design

Software Project Management

Q54 / 115

Which model assumes that systems are created from reusable components, scripting or database programming?

A an application-composition model B a post-architecture model C a reuse model D an early design model

Software Project Management

Q55 / 115

Which of these is the external sounds present in the channels of communication?

A noise B semantic problems C cultural barriers D over communication

Software Engineering

Q56 / 115

Which of the following is present in a nested concurrent state machine?

A trigger oriented transitions?? B self transitions?? C internal transitions?? D completion transitions

Software Engineering

Q57 / 115

Cities, states and country can be defined as

A building an excellent product or system that no one really wants B losing the support of senior management due to a change in focus or change in people C lack of documented requirements or software scope D losing budgetary or personnel commitment

Software Engineering

Q58 / 115

________ is an object in to real world that is distinguishable from all other objects

A 2 phases B 3 phase C 5 phases D 6 phases

Software Engineering

Q59 / 115

Software project management comprises of a number of activities, which contains _.

A may be actors B may only receive output from a use case C may only provide input to a use case D are out of scope because we are describing only one system at

Software Engineering

Q60 / 115

…………..is concerned with how a systems tied together in order to achieve common goal thus forming integration.

A System B Software C Subsystem D Physical system

Software Engineering

Q61 / 115

What is 'test-driven infrastructure' (TDI) in DevOps and how does it extend the TDD principle?

A TDI means writing unit tests for infrastructure deployment scripts only B TDI applies TDD to infrastructure code: tests for server configuration, network policies, and deployment scripts are written first (using tools like ServerSpec, InSpec, Terraform test) — verifying infrastructure behaves as specified before and after changes, exactly as TDD verifies application code C TDI replaces all monitoring and alerting in production with pre-deployment tests D TDI only applies to containerised environments using Kubernetes and Docker

Software Engineering

Q62 / 115

What is 'software cost estimation' and why do most software projects consistently underestimate?

A Software projects underestimate because developers deliberately lie to management about effort B Cost estimation predicts effort, schedule, and resources needed; underestimation is driven by: optimism bias (planning fallacy), omitting activities (testing, documentation, meetings), unclear requirements at estimation time, political pressure to win contracts, and the cone of uncertainty being ignored C Underestimation only occurs in government projects due to bureaucratic planning processes D Software estimation is inherently impossible and all estimates are equally unreliable

Software Engineering

Q63 / 115

Which type of coupling involves passing an aggregate data structure to another object which uses only a portion of that component?

A discard classes with vague names or murky responsibilities B ??discard classes will not do something out of scope C ??look for actors D all of the mentioned

Software Engineering

Q64 / 115

This set of Basic Software Engineering Questions and Answers focuses on “Function Oriented Software Design”. 1. Choose the option that does not define Function Oriented Software Design.

A SDD B SRS C DD D D SRD

Software Engineering

Q65 / 115

The output of a lexical analyzer is

A texteditor B assembler C linker D all of these

Software Engineering

Q66 / 115

What encapsulates both data and data manipulation functions

A device B execution environment C artifact D device & execution environment

Software Engineering

Q67 / 115

What is the important criterion in deciding what testing technique to use?

A load creator B virtual users C load user D none of the above

Software Engineering

Q68 / 115

Which granularity level of testing checks the behavior of module cooperation?

A describing the customer complaints B establishing a basis for the creation of a software design C defining a set of requirements that can be validated once the software is built D none of the mentioned

Software Engineering

Q69 / 115

Which descriptions are true for the use case description format?

A class B use case?? C state machine?? D activity??

Software Engineering

Q70 / 115

Minimum possible value of reliability is

A Software Cost B Hardware Cost C Personnel Costs D All of the above

Software Engineering

Q71 / 115

Which design pattern is used in the Java Database connectivity JDBC(TM)?

A main B controller C head D parent

Software Engineering

Q72 / 115

Which among the following depicts positive and negative relation between driving factor and performance factor?

A cultural, country, commitment B cultural, comunication and commitment C cultural, comunication and contribution D none of the above

Software Engineering

Q73 / 115

Refinement is a process of

A object diagram B activity diagram C class diagram D interaction diagram

Software Engineering

Q74 / 115

Looping in an activity diagram is best represented using what?

A realization B extend C include D all of above.

Software Engineering

Q75 / 115

What is the main purpose of integration testing?

A testers B end users C customer D developers

OOP Using C++

Q76 / 115

What is 'this pointer' type?

A T* const (in non-const member) or const T* const (in const member) B T* always C const T* always D void*

OOP Using C++

Q77 / 115

What is the output: int a[]={1,2,3}; cout<<end(a)-begin(a);

A 3 B 1 D Compile error

OOP Using C++

Q78 / 115

What is 'std::from_chars'?

A Parses number from char buffer without locale/allocation B Same as stoi C Throws on error D Returns string

OOP Using C++

Q79 / 115

Which operator has the lowest precedence in C++?

A = B || C ?: D throw

OOP Using C++

Q80 / 115

What is the output: int a=2,b=3; cout<<(a<<b)-(b<<a);

A 4 B 12 C -4 D Compile error

OOP Using C++

Q81 / 115

Which type can hold a pointer to any object type?

A void* B char* C int* D nullptr_t

OOP Using C++

Q82 / 115

What is the output: int a[]={1,2,3,4,5}; cout<<a[0]+a[4];

A 6 B 5 C Compile error D Undefined

OOP Using C++

Q83 / 115

What is the output: auto x=42u; cout<<sizeof(x);

A 4 B 8 C 2 D Compile error

OOP Using C++

Q84 / 115

What is the output: int x=0b11110000; cout<<(x>>4&0xF);

A 15 C 240 D Compile error

OOP Using C++

Q85 / 115

What is the output: try{throw;}catch(...){cout<<'C';}

A terminate B C C Compile error D Undefined

OOP Using C++

Q86 / 115

What is the output: int x=5,y=5; cout<<(x^=y,y^=x,x^=y);

A 5 C Compile error D Undefined

OOP Using C++

Q87 / 115

What is the output: auto up=make_unique<int[]>(3); up[0]=1;up[1]=2;up[2]=3; cout<<up[0]+up[2];

A 4 B 6 C Compile error D Undefined

OOP Using C++

Q88 / 115

What is the output: class A{public:int x; A(initializer_list<int> il):x(*il.begin()){}}; A a={42,1,2}; cout<<a.x;

A 42 B 1 C Compile error D Undefined

OOP Using C++

Q89 / 115

What is 'std::views::as_rvalue' (C++23)?

A Creates a view that moves elements instead of copying B Same as move C A sort view D A filter

OOP Using C++

Q90 / 115

What is the output: int f(int x){return x%2?x:f(x/2);} cout<<f(12);

A 3 B 6 C Compile error D Undefined

OOP Using C++

Q91 / 115

What is the output: int x=5; cout<<clamp(x,1,4);

A 4 B 5 C 1 D Compile error

OOP Using C++

Q92 / 115

What is the output: auto f=[](auto x){ return x*2; }; cout<<f(5)<<f(2.5);

A 105 B Compile error C 105.0 D Generic lambda requires C++20

OOP Using C++

Q93 / 115

What is the output: class A{public:int x=10; virtual int f(){return x;}}; class B:public A{public:B(){x=20;} int f()override{return x*2;}}; A*p=new B; cout<<p->f();

A 40 B 20 C Compile error D Undefined

OOP Using C++

Q94 / 115

What is 'object slicing' in C++?

A Derived object assigned to base: derived part lost B Virtual function optimization C Memory fragmentation D Partial initialization

OOP Using C++

Q95 / 115

What is the output: int a=1,b=2; int *p=&a; p=&b; *p=10; cout<<a<<b;

A 1 10 B 10 10 C 1 2 D Undefined

Computer Fundamentals

Q96 / 115

Zero-knowledge proof allows?

A Sharing secrets freely B Proving knowledge of a secret without revealing it C Faster encryption D Authentication with passwords

Computer Fundamentals

Q97 / 115

Terraform is used for?

A Application testing B Infrastructure as Code (IaC) C UI design D Database management

Computer Fundamentals

Q98 / 115

Iris scanner identifies users based on?

A Eye color B Unique pattern of the iris C Retinal blood vessels D Pupil size

Computer Fundamentals

Q99 / 115

Which protocol synchronizes time with microsecond precision?

A NTP B PTP (Precision Time Protocol IEEE 1588) C SNTP D GPS only

Computer Fundamentals

Q100 / 115

Which of these is a compiled language?

A Python B JavaScript C C/C++ D Ruby

Computer Fundamentals

Q101 / 115

Hexadecimal 0.8 in decimal is?

A 0.5 B 0.8 C 0.53125 D 0.25

Computer Fundamentals

Q102 / 115

WebP image format provides?

A Only lossless B Both lossy and lossless compression with ~30% smaller than JPEG/PNG C No compression D Only 8-bit color

Computer Fundamentals

Q103 / 115

Docker uses which technology?

A Virtual machines B Containers C Hypervisors D Cloud VMs

Computer Fundamentals

Q104 / 115

Which generation introduced multiprogramming?

A First B Second C Third D Fourth

Computer Fundamentals

Q105 / 115

The first laptop computer was?

A Apple MacBook B IBM PC Convertible C Osborne 1 D Compaq Portable

Computer Fundamentals

Q106 / 115

Endianness refers to?

A Energy efficiency B Byte order in multi-byte data storage C Cache replacement policy D Memory access pattern

Computer Fundamentals

Q107 / 115

802.1X authentication uses?

A Username/password in plaintext B EAP (Extensible Authentication Protocol) via RADIUS server C MAC address only D Certificate only

Computer Fundamentals

Q108 / 115

Regression testing ensures?

A New features work B Old features still work after changes C System performance D Security compliance

Computer Fundamentals

Q109 / 115

JUnit is a testing framework for?

A Python B Java — unit testing C JavaScript D C++

Computer Fundamentals

Q110 / 115

Random forest is an ensemble of?

A SVMs B Decision trees trained on random subsets with feature randomness C Neural networks D K-means clusters

Computer Fundamentals

Q111 / 115

Which exception handling block always executes?

A try B catch C finally D throw

Computer Fundamentals

Q112 / 115

IFERROR function in Excel?

A Throws errors B Returns a custom value if formula returns error, otherwise returns formula result C Ignores all errors D Checks formula syntax

Computer Fundamentals

Q113 / 115

Which Linux command moves or renames a file?

A cp B mv C ren D move

Computer Fundamentals

Q114 / 115

The shortcut key for Undo in MS Word is?

A Ctrl+Z B Ctrl+Y C Ctrl+U D Ctrl+X

Computer Fundamentals

Q115 / 115

Which is the correct binary representation of -5 in 8-bit 2's complement?

A 10000101 B 11111011 C 01111011 D 10110101

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