Computer Languages Questions and Answers

Answer: A

A finite set of rules or steps followed in a calculation or in solving a problem is called an algorithm. A flow-chart is only a diagram that shows an algorithm graphically, a function is a named block of code in a program that performs one task, and a procedure is a similar block of code that may not return a value. None of the three is the general definition of finite rules for solving a problem.

Answer: C

The for loop ends with a semicolon, so its body is empty. The loop starts with i = 1 and increments i until the condition i < 10 fails. It stops when i becomes 10, and the printf after the loop then prints 10. It is not 9, since the increment happens before the test fails, and it is not 0, because i was reset to 1 at the start of the loop. The code is valid C, so there is no syntax error.

Answer: A

The true statement is that an interpreter translates one instruction at a time.

An interpreter reads a program statement by statement, translating each into machine actions and executing it before moving to the next. If it meets an error it stops there. Python and BASIC are commonly interpreted.

Translating the whole program at once is what a compiler does, producing an object file that can be run again without translation. Because an interpreter keeps no translated copy, the program must be interpreted again every time it runs, so 'Repeated Interpretation is not necessary' is false. 'None of the above' is wrong because the first statement is true.

Answer: D

Object oriented programming satisfies all of the above.

The main features of OOP are encapsulation (bundling data and the methods that act on it, and hiding internal details), inheritance (deriving new classes from existing ones), and polymorphism (one interface, such as a method name, behaving differently for different object types). Abstraction is usually listed as the fourth.

Since all three listed criteria are core OOP principles, choosing any single one would leave out the other two.

Answer: C

Correct answer: a program remark

The line is enclosed in the double slashes that mark a comment, and its content is a note describing what the program does. It declares nothing and computes nothing, which is what distinguishes a remark from a function or a variable.

Answer: A

Correct answer: 8

ASCII proper uses seven bits, giving 128 codes, but each is stored in a byte, and the extended sets that use the eighth bit are what most systems actually implement. Of the values offered, 8 is therefore the one intended; 16 bits belongs to Unicode's UTF-16.

Answer: C

Correct answer: both (a) and (b)

COMAL and BASIC are both high level languages: each lets the programmer write in terms of the problem rather than of the machine, and each needs translating before it can run. Standard is not the name of a language.

Answer: C

Correct answer: 1024 megabytes

Each step in the binary sequence multiplies by 1024: 1024 bytes make a kilobyte, 1024 kilobytes a megabyte, and 1024 megabytes a gigabyte.

Answer: A

Correct answer: compiler

A compiler translates a whole high level program into machine code before it is run. Translator is the general term covering compilers, interpreters and assemblers, so it is less precise than the answer the question wants.

Answer: A

Correct answer: assignment

A statement that gives a value to a variable is an assignment. The name does not change with the type of the value, which is why the three qualified options are not terms in use.