Please help answer questions 1-7:
Question 1 1 point Which of the following statements are true When querying for a 16 byte record, exactly 16 bytes of data is read from disk. Writing to an SSD drive is more costly than reading from an SSD drive. In a heap file, all pages must be filled to capacity except the last page. Assuming integers take 4 bytes and pointers take 4 bytes, a slot directory that is 256 bytes can address 64 records in a page. In a page containing fixed-length records with no nullable fields, the size of the bitmap never changes. Question 2 1 point Which of the following are true about the benefits of using a record header for variable length records? Does not need delimiter character to separate fields in the records. Always matches or beats space cost when compared to fixed-length record format. Can access any field without scanning the entire record. Has compact representation of null values. unanswered Question 3 2 points Is fragmentation an issue with packed fixed length record page format? Yes No Is fragmentation an issue with variable length records on a slotted page? Yes No Question 7 Question 4 1 point We usually use bitmaps for pages with fixed-length records. Why not just use a slotted page for pages with fixed-length records? Better time complexity Just a convention, either have the same performance Better space complexity Slotted pages only work if each of the records is a unique length 1 point Which of the following are true about the benefits of using a record header for variable length records? Does not need delimiter character to separate fields in the records. Always matches or beats space cost when compared to fixed-length record format. Can access any field without scanning the entire record. Has compact representation of null values. Question 5 2 points Assume we have a heap file A implemented with a page directory. One page in the directory can hold 16 page entries. There are 54 pages in file A in total. In the worst case, how many IOs are required to find a page with free space? In the worst case, how many los are required to write a record to a page with free space (assuming at least one free page exists)? Question 6 1 point Which of the following statements are true When querying for a 16 byte record, exactly 16 bytes of data is read from disk. Writing to an SSD drive is more costly than reading from an SSD drive. In a heap file, all pages must be filled to capacity except the last page. Assuming integers take 4 bytes and pointers take 4 bytes, a slot directory that is 256 bytes can address 64 records in a page. In a page containing fixed-length records with no nullable fields, the size of the bitmap never changes
