All Free Computer Science and IT MCQs with Answers

1251. Father of "C' programming language?

• A. Dennis Ritchie
• B. Prof John Keenly
• C. Thomas Kurtz
• D. Bill Gates

Explanation: Dennis Ritchie developed the C programming language at Bell Labs, making him widely known as its father. The other names listed are associated with different areas or are not the creator of C.

1252. ____________translates and executes program at run time line by line?

• A. Compiler
• B. Interpreter
• C. Linker
• D. Loader

Explanation: An interpreter translates and executes source code one statement at a time while the program runs. A compiler generally translates the program before execution and produces object or executable code.

1253. A fault in a computer program which prevents it from working correctly is known as___________?

• A. Boot
• B. Bug
• C. Biff
• D. Strap

Explanation: A bug is a fault or defect in a program that causes incorrect or unexpected behaviour. Boot refers to starting a computer, not to a programming error.

1254. A computer program that converts an entire program into machine language is called a/an

• A. Interpreter
• B. Simulator
• C. Compiler
• D. Commander

Explanation: A compiler translates an entire source program into machine code or another lower-level form before execution. An interpreter translates and executes instructions one at a time.

1255. An error in software or hardware is called a bug. What is the alternative computer jargon for it?

• A. Leech
• B. Squid
• C. Slug
• D. Glitch

Explanation: Glitch is common computer jargon for a minor fault or unexpected malfunction in software or hardware. Leech, squid and slug are not standard synonyms for a computer bug.

1256. Who invented the high level language "C"?

• A. Dennis M. Ritchie
• B. Niklaus Writh
• C. Seymour Papert
• D. Donald Kunth

Explanation: Dennis M. Ritchie created the C programming language at Bell Labs in the early 1970s. Niklaus Wirth is associated with Pascal, not C.

1257. Which programming languages are classified as low level languages?

• A. BASIC, COBOL, Fortran
• B. Prolog
• C. C, C++
• D. Assembly languages

Explanation: Assembly language is a low-level language closely tied to a processor's instruction set and registers. BASIC, COBOL, Fortran and Prolog are generally classified as high-level languages, while C and C++ are commonly treated as high-level or middle-level languages.

1258. The first computers were programmed using___________?

• A. Assembly language
• B. Machine language
• C. Source code
• D. Object code

Explanation: The earliest computers were programmed in machine language, using binary instructions directly understood by the processor. Assembly language came later as a more readable symbolic representation of machine instructions.