9-36. In magnetic core memories, a single core can store how many total bits of a word? 1. One 2. Two 3. Three 4. Four 9-37. In the core element of a magnetic core memory, what condition determines whether a 1 or a 0 is stored? 1. The temperature of the core aperture 2. The absence or presence of a magnetic field 3. The intensity of the magnetic field around the core 4. The direction of the current flow around the core 9-38. Most of the semiconductor memories used in modern digital computers are of what type? 1. ROM MSI 2. RAM SSI 3. MOS LSI 4. NIS NSI 9-39. A ferromagnetic material deposited on a substrate of thin glass is what type of memory storage device? 1. Magnetic disk 2. Magnetic drum 3. Magnetic tape 4. Thin film 9-40. A cylinder that rotates at a constant speed is what type of memory storage device? 1. Magnetic disk 2. Magnetic drum 3. Magnetic tape 4. Thin film 9-41. A storage medium NOT used as a main storage medium due to its long access time, but widely used to store large amounts of data or as a main storage backup, is what type of memory storage device? 1. Magnetic disk 2. Magnetic drum 3. Magnetic tape 4. Thin film 9-42. A convenient storage medium for semipermanent storage of mass volumes of production programs is what type of memory storage device? 1. Magnetic disk 2. Magnetic drum 3. Magnetic tape 4. Thin film 9-43. What section of the digital computer is the interface the computer and external 1. CU 2. I/O 3. ALU 4. IDSU 9-44. What two methods are used transmit digital data? 1. Linear and nonlinear 2. Serial and nonserial 3. Serial and parallel between devices? to 4. Parallel and nonparallel 9-45. Each bit of a binary word to be transmitted must have its own data path. This is a characteristic of what type of digital data transmission system? 1. Nonlinear 2. Nonserial 3. Serial 4. Parallel 9-46. What is the simpler and less expensive method of digital data transmission? 1. Nonlinear 2. Nonserial 3. Serial 4. Parallel 62