Computer Science

A compiler translates the entire high-level program into low-level machine code in one go, unlike an assembler which translates assembly language, or other tools that do not perform this function.

A compiler is a system program that translates instructions written in a high-level programming language into machine language that the computer's processor can execute directly. This matches option A.

Christopher Latham Sholes invented the QWERTY keyboard layout for the typewriter, which became the standard keyboard layout used today.

Bjarne Stroustrup developed C++ in 1979 at Bell Labs as an extension of the C programming language, adding object-oriented features. The other options are notable computer scientists but not related to C++ development.

Grace Hopper developed the first compiler, which translated symbolic mathematical code into machine-readable instructions, pioneering programming language development.

James Gosling is credited with creating the Java programming language in 1995 while working at Sun Microsystems. The other options are creators of different technologies: Guido van Rossum created Python, Ken Thompson co-created Unix, and Tim Berners-Lee invented the World Wide Web.

Niklaus Wirth created the Pascal programming language in the late 1960s and early 1970s. The other options are creators of different programming languages: John Backus developed Fortran, and Dennis Ritchie developed C.

In computer systems, 'resilience' refers to the ability of a system to remain operational and quickly recover despite failures or adverse conditions. It emphasizes the system's capacity to adapt to and recover from disruptions such as hardware faults, software bugs, or attacks. 'Reliability,' on the other hand, refers to the probability that a system will perform its intended function without failure over a specified period. While reliability focuses on consistent performance and minimizing failures, resilience focuses on maintaining operation and recovery when failures occur. Given the question's emphasis on remaining operational despite failures, 'Resilience' is the most accurate term.

On a standard computer keyboard, numeric keys do not have a classification as 'primary' or 'secondary' keys in the typical sense. The numeric keys on the top row primarily input digits 0-9 and also produce secondary symbols when combined with the Shift key (e.g., 1 and !). The numeric keypad on the right side of full-size keyboards primarily inputs numbers but can also perform secondary functions like arithmetic operations when Num Lock is off. The terms 'primary' and 'secondary' keys are not standard classifications for numeric keys. Therefore, the correct answer is 'None of these.'

Grace Hopper was a pioneering computer scientist who played a key role in developing COBOL in 1959, making her the correct answer. The other options are notable computer scientists but were not involved in COBOL's creation.