Mainframe Interview Questions and Answers

Mainframe Interview Questions : Mainframe computers (colloquially referred to as “big iron”) are computers used primarily by large organizations for critical applications; bulk data processing, such as census, industry and consumer statistics, enterprise resource planning; and transaction processing. They are larger and have more processing power than some other classes of computers: minicomputers, servers, workstations, and personal computers.

The term originally referred to the large cabinets called “main frames” that housed the central processing unit and main memory of early computers. Later, the term was used to distinguish high-end commercial machines from less powerful units. Most large-scale computer system architectures were established in the 1960s but continue to evolve. Mainframe computers are acting as servers.

Several manufacturers produced mainframe computers from the late 1950s through the 1970s. The group of manufacturers was first known as “IBM and the Seven Dwarfs”:p.83 usually Burroughs, UNIVAC, NCR, Control Data, Honeywell, General Electric and RCA, although some lists varied. Later, with the departure of General Electric and RCA, it was referred to as IBM and the BUNCH.

IBM mainframes are large computer systems produced by IBM since 1952. During the 1960s and 1970s, the term mainframe computer was almost synonymous with IBM products due to their market share. Current mainframes in IBM’s line of business computers are developments of the basic design of the IBM System/360.


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