Computer Science Questions and Answers
Challenge your competence level in computers, computing, algorithms, hardware and software with these Computer science questions and answers.
Challenge your competence level in computers, computing, algorithms, hardware and software with these Computer science questions and answers.
What does R stands for in the CRUD acronym ?
Retrieve
Redirect
Read
Relate
Correct answer is C
In the CRUD acronym, R stands for 'Read'. CRUD stands for Create, Read, Update, and Delete. These are the four basic functions of persistent storage in databases
coordinating unit
Memory unit
Arithmetic Logic unit
Control unit
Correct answer is D
The Control Unit of the Central Processing Unit (CPU) coordinates other units and manages the computer resources. It directs the operation of the processor, and interacts with the other hardware components in the system to carry out the instructions of a program. It is responsible for fetching, decoding, and executing instructions from the memory unit and performing arithmetic and logical operations
Evaluate \(1011_2 + 122_4\), leaving your answer in base 10.
37
51
47
73
Correct answer is A
1011\(_2\) = 1 × 2\(^3\) + 0 × 2\(^2\) + 1 × 2\(^1\) + 1 × 2\(^0\)
1 × 8 + 0 × 4 + 1 × 2 + 1 × 1 = 8 + 0 + 2 + 1 = 11
122\(_4\) = 1 × 4\(^2\) + 2 × 4\(^1\) + 2 × 4\(^0\)
1 × 16 + 2 × 4 + 2 × 1 = 16 + 8 + 2 = 26
11 + 26 = 37
Which of these storage devices can act as a buffer between the CPU and the main memory ?
Hard disk
Floppy disk
Cache Memory
Flash drive
Correct answer is C
Cache memory is a very high speed semiconductor memory which can speed up CPU, it acts as a buffer between the CPU and main memory
What is the difference between an assembler and a compiler ?
an assembler converts a machine language code into assembly level language code while a compiler converts high level programming language to a machine language code
an assembler converts assembly level language code into machine language code while a compiler converts high level programming language code to a machine language code
a compiler converts assembly level language code into machine lange while an assembler converts high level programming language to a machine language code
they both convert assembly level language code into machine language
Correct answer is B
An assembler converts assembly level language code into machine language code while a compiler converts high level programming language code to a machine language code