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Computer Fundamentals → Introduction to Computer 38

C language was developed by?
Dennis Ritchie
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Which language has the principle 'write once, run anywhere'?
Java
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SQL stands for?
Structured Query Language
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Which of the following is a DBMS?
MySQL
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DDR stands for in DDR RAM?
Double Data Rate
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Which of the following is a high-level programming language?
Python
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An algorithm must be?
Finite, definite, and effective
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What is the time complexity of binary search?
O(log n)
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Which sorting algorithm has worst-case O(n log n)?
Merge sort
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Stack data structure follows?
LIFO
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Queue data structure follows?
FIFO
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A linked list node contains?
Data and pointer to next node
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Binary tree node has maximum?
2 children
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In a full binary tree, every node has?
0 or 2 children
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Recursion is?
Function calling itself
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Which of the following is NOT an OOP concept?
Normalization
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Encapsulation in OOP means?
Hiding implementation details inside objects
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Inheritance in OOP allows?
One class to derive properties from another
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Polymorphism means?
Many forms — same interface, different implementations
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Which is an object-oriented programming language?
Java
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A database index improves?
Data retrieval speed
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Primary key in a database must be?
Unique and not null
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Foreign key creates a relationship between?
Two different tables
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Normalization in databases aims to?
Reduce data redundancy and improve integrity
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Which SQL command retrieves data?
SELECT
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Which SQL command adds new records?
INSERT INTO
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Which SQL command modifies existing records?
UPDATE
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Which SQL command removes records?
All of these remove records
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What does JOIN do in SQL?
Combines rows from two or more tables
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An API stands for?
Application Programming Interface
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REST API uses which protocol?
HTTP/HTTPS
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JSON stands for?
JavaScript Object Notation
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XML stands for?
Extensible Markup Language
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Which of the following is NOT a programming paradigm?
Encryption
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The full form of CPU is?
Central Processing Unit
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Which key combination is used to select all in Windows?
Ctrl+A
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Which component converts DC power to AC for use in a computer?
UPS
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A modem's speed is measured in?
bps
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Computer Fundamentals → Memory Units 2

RAM speed is measured in?
MHz
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Which JOIN returns all records from both tables?
FULL OUTER JOIN
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